A newly proposed clock that uses the orbit of a neutron around an atomic nucleus to keep time would be so accurate that it would only gain or lose 1/20th of a second every 14 billion years – or about the lifetime of the universe.
Of all the futuristic technologies scientists have sworn would change our lives forever, none is more promising, and more elusive, than fusion power. Fusion is a great choice because we know it can produce a lot more energy than most efforts we now use. We have no greater evidence than our own stars and the sun.
This composite image of Arp 147, a pair of interacting galaxies located about 430 million light years from Earth, shows X-rays from the NASA’s Chandra X-ray Observatory (pink) and optical data from the Hubble Space Telescope (red, green, blue) produced by the Space Telescope Science Institute (STScI) in Baltimore, Md.